John w



"M 62|,9s4. Patented lanza, |899.

.L-w. HART a B. F. PANcoAsT.`

PUMP.

(Applicatian med mr. 1'6, 1159s,)

(No Model.) 2 Sheets-Sheet I.

IHN

No. 62I,9j64. Patented. Mar. 28, |899.

J. W. HART &. B. F. PANCUAST.

PUMP.

(Application nied uw. 1e, 1898.). (lo Model.) 2 Sheets-Sheet 2.

Tn: noRms PETERS oo.. Pub-rauwe., wAsHmmoN. o. L..

UNrrEn STATES JOHN WV. HART AND BENJAMIN PANOOAST, OF IOLA, KANSAS mee.

PATENT BRADLY, OF SAME PLACE.

PUMP;

SPECIFICATION forming part of Letters Patent No. 621,964, dated March 28, 1899; Application filed March 16,1898. Serial No. 674,084. (No model.)

To @ZZ whom t may concern.-

Be it known that we, JOHN W. HART and BENJAMIN F. PANooAsr, citizens of the United States, residingat Iola, in the county of Allen and State of Kansas, have invented a new and useful Pump, of which the following is a specification.

This invention relates to pumping apparatus of the class comprising upper and lower pistons arranged to operate in reverse order, so as to deliver a continuous stream of water, and which may be used `for lifting and forcing water to any desired elevation.

An essential .feature of the invention is to secure a direct application of power to the pistons, thereby obviating side stress which detracts materially from the force-expended and results in a rapid wearing away of the piston-rods and their bearings.

A further purpose of the invention is to devise a piston of simple construction and which will maintain a tight joint with the pump-barrel and fold so as to offer a minimum amount of resistance when descending through the water preparatory to lifting the same upon the upstroke of the piston.

For a full understanding of the merits and advantages of the invention reference is to be had to the accompanying drawings and the following description.

The improvement is susceptible of various changes in the form, proportion, and the minor details of construction without departing from the principle or sacrificing any of the advantages thereof, and to a full disclosure of the invention an adaptation thereof is shown in the accompanying drawings, in which- Figure 1 is a perspective view of a pump designed for attaining the objects of this invention. Fig. 2 is a vertical central section thereof. Fig. 3 is a plansection on the line X X of Fig. 2.' Fig. 4 is a detail View in pero spective of a piston. Fig. 5 is a transverse section of a piston on a larger scale. Fig. 6 is a detail'view in perspective of the component parts of a piston, the same being disassociated and disposed in a group.

Corresponding and like parts are referred to in the following description and indicated in the several views of the drawings by the same reference characters.

The pump-barrel 1 may be of any diameter and length and formed of suitable material and is swelled at its upper end to provide an air-chamber above the topmost piston when at the limit of its upstroke, so as-to increase the efciency of the pump. The pump-barrel is closed at its lower end by a cap 2, from which depends a suction-tube 3, which is closed at its upper end by means of a foot or check valve 4, which opens upwardly and inwardly. A cap 5 closes the upper end of the pump-barrel and, together with the mountings for the operating parts, constitutes the pump-head. Standards 6 rise vertically from the cap 5 and are connected at their upper ends by a cross-piece 7, having a centrallydisposed guide 8, through which the pistonrod 9 works. An arm 10 extends vertically from one end of the cross-piece 7, and a lever 11 is pivoted a short distance from its inner end to the upper portion of the said arm. A link 12 connects the inner end of the lever ll with the upper end of the piston-rod 9 and alines vertically with the latter, so as to 'secure a direct application of the power to the said piston-rod when the pump is in operation.

A tubular piston-rod 13 has a relative sliding movement with respect to the piston-rod 9 and carries the upper piston at its lower end and is provided at its upper end with a lateral guide-arm 14, which acts jointly with one of the standards 6, so as to insure a vertical movement of the piston-rod 13. The lateral guide-arm .14 is strengthened at its outer end by a brace 15, which is secured at its outer end to the outer extremity of the arm 14 and at its inner end to the upper extremity of the piston-rod 13 a distance from the inner end of the said arm 14. The outer end portions of the guide-arm 14 and brace l5 are cut away .at one side, so as to bear against one side and the inner edge of the standard 6, which cooperates with the said guide-arm 14, thereby insuring a direct vertical movement of the piston-rod 13 when the pump is in active operation. A link 16 connects the guide-arm 14 intermediate of its ends with the lever 11 in such a manner so that the fulcruin of the lever comes about midway of the pivotal connection l[herewith of the links 12 and 16. By having the links 12 and 16 connect with the lever at opposite sides of its fulcrum the piston-rods and the pistons connected therewith are caused to operate inversely, whereby upon the ascent of one piston the other correspondingly descends, thereby resulting in a continuous stream of Water being delivered.

By having the guide-arm 11 cutaway at its inner side or upon the side remote from the link 16 the projecting terminal portion is enabled to obtain a bearing against the side of the standard facing the link 16, so as to compensate for side stress upon the guide-arm when the pump is in operation. Moreover, the parts can be dismembered and assembled with ease and despatch, as the guide-arm 14:

can be turned outward at its free end so as to clear the standard when it is required to separate or place the parts together. The guidearm, being movable with and having direct attachment to the piston-rod 13, prevents the lifting force from imparting lateral strain to the said piston-rod 13 at any stage of its movement. Moreover, there is no change of position between the guide and the point of application of the lifting force to the piston-rod such as would be the case if the rod were fixed.

The pistons are of like construction, the upper piston being secured to the lower end of the tubular piston-rod 13 and the lower piston being attached to the lower extremity of the piston-rod 9. Each of the pistons comprises a middle and side portions, which in turn are made up of sections, the side parts being hingedor pivoted to the middle part, so as to fold upward when the piston is deseendin g through the water prior to lifting the column upon the upstroke. The middle part of a piston is formed of an upper plate 17, a lower plate 1S, and an intermediate packing 1f), of leather, rubber, or like material, commonly employed in apparatus of this character for securing a close joint between pistons and their working cylinders or barrels. The packing 19 is placed between the plates 17 and 1S, and the parts are secured by bolts passing through the three sections. The upper plate 17 is formed centrally with a vertical nipple 20, to which a piston-rod is secured by a screw-thread connection. The side portions of the pistons are of duplicate formation, comprising an upper plate 21, a lower plate 22, and an intermediate packing 23, the three parts being secured together by bolts. The upper plates 21 are hinged or pivoted at their inner edges to the edges of the upper plate 17, thereby admitting of t-he side portions of the pistons folding upward, but limited in their downward movement by having their inner edges abutting against the edges of the middle portion. The side portions of the pistons are of semicireular form and together with the middle portions form circular pistons. The packing between the plates projects a short distance beyond the outer edges of the plates, so as to come in contact with the sides of the barrel and secure a close joint therewith.

Upon operating the lever 11 the pistons receive a simultaneous movement in opposite directions, thereby securing an uninterrupted flow of water in the ordinary manner. The water is discharged through a spout or outlet-pipe 24, applied to the cap 5 and communicating with the upper portion of the pumpbarrel. The piston-rod 9, as previously described, is directed in its vertical movement by means of the guide S and a centrally-disposed opening of the cap 5, and the tubular piston-rod 13 is guided in its reciprocating movements by the piston-rod 9, the guidearm 14, and the opening of the cap 5. The link 16 has connection with the outer side of the guide-arm 14, thereby serving to hold said arm against the standard 6, against which it rests. The arrangement of the operating mechanism insures the power being applied directly to the piston-rod and a movement of the latter in Vertical lines, so as to obviate side stress and the consequent wear and friction.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-

1. In a pump, the combination with the cylinder, the pump-head having a flat upright standard 6, a pair of oppositely-moving pistons, and the concentric piston-rods; of an operating-lever fulcrumed intermediate its ends above the pump-head, a link 12 connecting one end of the lever with the upper end of the inner piston-rod and alining with the latter, a lateral guide-arm 14: rigidly secured at one end to the tubular piston-rod, and

having a rigid brace deiieeted to the outer extremity of said rod, said lateral guide-arm, contiguous to its outer end, being rabbeted to slidably engage the inner edge and one flat side of the standard, the rabbet of said guide-arm also permitting the latter to bc swung clear of the standard by turning the tubular piston-rod therewith, and a link 16 pivotally connected at its lower end to the lateral guide-arm at an intermediate point of the latter, and at its upper end to the operating-lever at one side of its fulcrum, substantially as set forth.

2. In a pump, a piston composed of a middle and side parts each formed of upper and lower plates and an intermediate packing, corresponding plates and packing being bolted or otherwise secured together, the upper IZO plates loeing hinged at their inner edges to u our own we have hereto affixed our signatures the edges vof the middle plate whereby the in the presence of two witnesses. side portions of the piston are adapted to fold JOHN WV. HART.

upward and are limlted 1n their downward Y Y A movement when the three parts are in hori- LENJAMIN F' PANCOASVL zontal alnementby having the meeting edges Witnesses:

abutting, substantially as set forth. J. B. GOSHORN,

In testimony that We claim the foregoing as PAU L GOSHORN. 

